Peter O'Reilly (29 September 1902 – 25 February 1940) was an Irish hurler who played as a full-back for the Kilkenny senior team. Born in Kilkenny, O'Reilly arrived on the inter-county scene at the age of twenty-three when he first linked up with the Kilkenny senior team. He made his debut in the 1925-26 National League. O'Reilly went on to play a key part for more than a decade, and won three All-Ireland medals, six Leinster medals and one National Hurling League medal. O'Reilly was an All-Ireland runner-up on three occasions.